The 10-inch Gun M1895 (254 mm) and its variants the M1888 and M1900 were large coastal artillery pieces installed to defend major American seaports between 1895 and 1945.

In 1885, William C. Endicott, President Grover Cleveland's Secretary of War, was tasked with creating the Board of Fortifications to review seacoast defenses.

The findings of the board illustrated a grim picture of existing defenses in its 1886 report and recommended a $127 million construction program of breech-loading cannons, mortars, floating batteries, and submarine mines for some 29 locations on the US coastline.

[5] A 10-inch "depressing gun" M1896 on an M1894 disappearing carriage was mounted in an experimental battery at Fort Monroe, Virginia in the northeast bastion.

[6] After the American entry into World War I, the Army recognized the need for large-caliber railway guns for use on the Western Front.

Thirty-six Schneider-type sliding-mount railway carriages for 10-inch guns were contracted to be manufactured by the Marion Steam Shovel company and delivered to France for finishing by March 1919.

The remaining two barbette guns from Forts Flagler and Worden were deployed at Wiseman's Cove, Botwood, Newfoundland and no longer exist.

[15] Along with other coast artillery weapons, some of the 10-inch guns in the Philippines saw action in the Japanese invasion in World War II.

Two 10-inch Guns M1895MI (#25 & #22 Watervliet) on Disappearing Carriages M1901 (#14 & #16 Watertown), Battery Grubbs, Fort Mills, Corregidor Island, Philippines.